Hidden Variables
is." Without another word, he pushed himself off along the corridor leading forward to the bridge.
    Special job? Pondering that, I crawled in through the low door. After the crew area, the air inside here seemed sweeter. I sniffed appreciatively and looked around me for the light switch. Then I ducked as a vast pink shape swooped toward me through the gloom. My shout of alarm was answered by two high-pitched screams, like a steam whistle—two-toned—and a second pink zeppelin shot past me from the other direction. I hurled myself backward through the door and slammed it closed.
    Nielsen was floating just outside, thoughtfully scratching his grizzled head with one hand and picking his nose with the other. I grabbed hold of his grimy shirt.
    "What's going on in there? Something almost got me as soon as I was inside!"
    He nodded dreamily, and fought his usual losing battle with the English language. "Them, just playful. Like free fall, you know. Soon, them get used you, there no problem; you get used them, there no problem."
    "Them?" Shades of four-meter ants, rampaging through the cargo hold.
    "Cargo. You special priest, no? You special for care this. Man sign you up, say you know all about. Come in."
    He opened the low door again and crawled through. Somewhat reluctantly, I followed. As my eyes became accustomed to the poor light, I saw that he was standing by—and patting affectionately—two colossal pigs. They must have weighed a hundred and fifty kilos each, and they were floating peacefully in the center of the big cargo hold.
    "This Penelope." He stroked a monstrous sow, who nuzzled his ear happily. "This Pomander." The boar, a few kilos lighter, grunted when he heard his name. Nielsen patted him. "Smart pigs. New breeding stock for Mars protein program. Prize cargo. You have job here, look after. Now, you get to know each other!"
    A shock, an undeniable shock. On the other hand, as I got to know them they became a welcome alternative to the four crew members. For one thing, they were cleaner in habits. I still had trouble with the logic of it, though. I knew that pigs can handle space travel well—they are about the only animals that do. Cows, sheep, and horses can't take it at all, can't swallow in free fall, and there had been a certain reluctance to ship goats because of other reasons. But why would anyone choose to ship the pigs in the high season, when orbital positions were bad? And why was it a danger-money trip? The crew seemed neither to know nor care.
    The next day I had something else to worry about. Four crew members and me, that was supposed to be the full roster. At dinner, though (Ramada's burnt offerings—the pigs dined better!), a sixth man appeared, just before we got ready to pump ion for Mars. Poindexter introduced him as Vladic, a supernumerary and last-minute addition to the roster. From the first, he seemed to show altogether too much interest in me. He seemed to spend most of his time snooping aft, keeping an eye on my every move. When he saw me looking at him, he would hurry away forward—then be back in a few minutes, watching again.
    Would they send a rub-out man this far after me? I knew that they never let an old score fade away without being settled. That night I locked the door, wedged it, put a mockup in my bunk, and settled myself down to sleep between the comforting bulwarks of Penelope and Pomander.
    I didn't call them that. That's how history knows them, but I thought they were silly names. In my mind, Penelope became the Empress of Blandings. Pomander, after I had seen him at work in his free-fall food trough, was renamed Waldo, in honor of my business partner.
    A variety of other names were rejected, some reluctantly. Rosencrantz and Guildenstern, Dido and Aeneas, Fortnum and Mason, Post and Propter (post hog, ergo propter hog), War and Peace, Siegfried and Brünnhilde (not fat enough—the pigs, I mean), Pride and Prejudice—it helped to pass the time.
    As the days passed, I

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